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| Content Provider | PubMed Central |
|---|---|
| Author | Kennedy, G. C. Rutter, W. J. |
| Abstract | Purine-rich stretches of nucleotides (GAGA boxes) are often found just upstream of transcription start sites in many genes, including insulin. Mutational analysis suggests that the GAGA box plays an important role in transcription of the rat insulin I gene. We identify here at least four different proteins that bind specifically to the insulin GAGA box. Using a GAGA oligonucleotide, we have isolated a cDNA encoding a sequence-specific protein from a HIT (hamster insulinoma cell line) lambda gt11 library. This protein, which we designate Pur-1 (for purine binding), binds to the GAGA boxes of the rat insulin I and II genes and the human islet amyloid polypeptide gene. Pur-1 is a potent transactivator in both pancreatic and nonpancreatic cells. Furthermore, Pur-1 is able to activate an intact insulin promoter in HeLa cells, where it is normally inactive. |
| Starting Page | 11498 |
| File Format | |
| ISSN | 10916490 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 23 |
| Volume Number | 89 |
| Language | English |
| Publisher Date | 1992-12-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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